[1V1, both leads are pure, healing, apocalypse, extremely powerful heroine, System, does not vilify the original male and female leads]
Perhaps my life had fallen into endless darkness from the very beginning. Endless wandering had long since numbed me. Everything was an unfortunate beginning, but your arrival became the only light in my life. - Mo Sangyan
The apocalypse erupts, and humanity's struggle to survive grows ever grimmer. Mo Sangyan transmigrates, and System Zero discovers that its Host is absurdly powerful, so the System decides to slack off. The members of Squad R always think Mo Sangyan is a delicate little thing, with frail shoulders that can't carry or lift anything. That is, until they see Sangyan teleport to save the captain and blow an enemy's head off with one shot. Cue a shriek like a startled groundhog!!! The teammates think their tall, handsome, cold and ruthless captain has changed. Now he likes acting coy, playing cute, and pretending to be adorable. Somehow, that seems even more horrifying. Jiang Xunye scoffs: that's because you don't have wives, you bunch of single dogs.
(The author wrote this brainless story, so please take your brain out before reading, I beg you.)
[This is my first time writing, so please don't flame me. Thank you.] Male lead: Jiang Xunye